title: A turn-on indole-based sensor for hydrogen sulfate ion.
abstract: A simple indole-based receptor 1 was prepared by a simple Schiff-base reaction of 1H-indole-3-carbaldehyde with ethane 1,2-diamine and its fluoroionophoric properties toward anions were investigated. Indole-based receptor 1 acts as a selective turn-on fluorescent sensor for HSO4(-) in methanol among a series of tested anions. Fluorescence spectroscopy, ultraviolet and nuclear magnetic resonance imaging support that the HSO4(-) indeed interacted with imine nitrogen and the proton of nitrogen in indole ring.
authors.affiliation: School of Applied Chemistry, Chung Shan Medical University, Taichung City, 40201, Taiwan.
authors.forename: Chin-Feng
authors.initials: CF
authors.lastname: Wan
authors.forename: Shih-Tse
authors.initials: ST
authors.lastname: Yang
authors.forename: Hsiang-Yi
authors.initials: HY
authors.lastname: Lin
authors.forename: Ya-Ju
authors.initials: YJ
authors.lastname: Chang
authors.forename: An-Tai
authors.initials: AT
authors.lastname: Wu
mesh_terms: D000838:Anions / Q000737:chemistry*; D005453:Fluorescence; D007211:Indoles / Q000737:chemistry*; D008163:Luminescent Measurements / Q000295:instrumentation / Q000379:methods*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013431:Sulfates / Q000737:chemistry*
chemical_list: D000838:Anions; D007211:Indoles; D013431:Sulfates; C030374:indole
keywords: chemosensor; fluorescence; hydrogen sulfate; indole; turn-on